Roaster.



Patented Sent. 9. |902.

BUASTER.

(Appltion led Apr. 5, 1000.)

J. A. GDEN.

rim-708,728.

(No Model.)

WITNESSES.-

d. i 73M UNITED ISTATES PATENT OFFICE.

JAMES A. OGDEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- THIRD TO CHARLES II. CORNELL, OF VALENTINE, NEBRASKA.`

ROAS'T ER.

SPECIFICATION forming' part of Letters Patent No. 708,728, dated September 9, 1902. Application filed April 5, 1900. lSerial No. 11,631. (No model.)

T @ZZ whom, t may concern.:

Be it known that I', JAMES A. OGDEN, a cilizen of the United States, and a resident of the city and county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Roasters, of which'y the following is a clear, full, andvsufcient specification, reference being had to the drawings annexed. 1o My invented machine consists, essentially, of a freely-swinging inclined plate which is heated and over which the ore is made to travel and means for facilitating the travelof the ore from the higher to the lowerlevel. I5 The means for heating the plate for giving it the freely-swinging motion and for caus-l ing the ore to travel from one end to the other to swing so that it will have a free and aci To jar the plate, so thatv the ore will be aided in traveling down the same,

3o tive motion.

I move it by the cam fm, which works with the plate or with the abutment n, and after it is disengaged therefrom allows the plate to swing and bump against the abutment a", and for convenience the plate is provided with the projection a for this purpose. The cam can also bump against the plate or the abutment fn, if desired. I heat the plate a by the furnace B through a slanting i'lue in which, formed beneath the plate-arch c, the plate a passes. Near the lower end of the fine is the fire-box and near the upper end the smoke-stack d. I make the plate a to extend in practice above the upper end of the furnace to receive the ore and below the lower end of it to deposit same free of the furnace. By placing the re-box near one end of the flue the portion of the plate over which the o ore will travelI last will be more intensely heated than the parts over which it had previously traveled, and hence a gradually-increasing heating be given to it during its travel downward to the lower end of the plate. The protuberances g g, arising from the bottom of the Hue, may serve to contract the flues at these points and concentrate the heat at these parts. Ahopper or troughbor other suitable means can be provided to feed the ore onto the plate co, and the edges ofthe 6o plate o, can be raised slightly to prevent the ore from flowing over the edges into the fine.

The operation of the device is as follows: As the ore passes from the hopper it falls on the plate t and the bumping given to the 65 plate makes it travel slowly down to the end of the plate. The plate t is .heated to the desired temperature by the furnace and the volatilized substances will pass off through the smoke-stack d. 7o

. Having now described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination, in a roaster, of a furnace havinga flue, an inclined plate situated in said tine, supports "for said plate, swinging links connectingsaid plate withsaid supports, and mechanism for positively moving said plate4 in one direction, and means for suddenly checking its motion in the other; substantially 8o as described.

2. The combination in a roaster, of a fur- -nace having an inclined flue, a fire-box situate at one end of the flue, a plate for containing the ore to be roasted situated in said flue, said plate projecting completely through said fire-box, and means for suspending said plate, and giving ita freely-swinging motion, substantially as described. y

3. Inaroaster the combination of afurnace. 9o h aving an inclined flue, an inclined plate Y passing through the said flue, and projecting at either end, supports for the plate exterior to the furnace, andv swinging links provided with turnbuckles, connecting the said plate with the said supports; substantially as described.

4. In a roaster, the combination with a furnace having an inclined Hue, of an inclined plate passing through the said flue, supports above the plate, swinging links connecting said plate to said supports, and mechanism TOO mism for bumping said plate Substantially :o as described.

In token whereof I have hereunto seb my for bumping said plate; substantially as described.

. The combination in a roasber, of a furate in said Hue, a plate for containing the ore to be roasted, situated in said flue, a portion of said plate being situated ove11 the said fire- E lVihnesses: box, means for suspending said plate and NORMAN T. MASON, giving inafreely-swinging motion and mech- B. B. SHEPHERD.

JAS. A. OGDEN.

nace having an inclined flue, a lire-box sibui hand this 16th day of March, 1900. 

